Propeller.



H. S. MORLEY.

PEOPBLLER.

APPLIOATION FILED 1011.11.1912.

1,072,249. Patented sept.2,1913.

lillmlllllllx illllliilil HERBERT S'S. MLY, QF NEWTON CENTER, MASSACHUSETTS.

PEOPELLEB.

Specication o! Letters Patent. Application led November 11, 1912. Serial No. 730,612.

Patented Sept. 2, 1913.

To all 'whom tmay concern f Be it known .that I,- HERBERT S. Monnier, a citizen Vof the United States, anda resident of Newton Center, in the county of Middlesex and State of Massachusetts, have invented a new 4and useful Improvement in Propellers, of which the following is a full, clear, and exact description.

This invention relates generally to reversible propellers, and .the improved construction is characterized by auxiliary blades for preventing racing of the engine when the propellingr blades are being reversed.

Theparticular embodiment of the invention comprises a hub carryingr propelling blades and retarding blades, the said blades being articulated so that when the propelling blades are reversed `the retarding blades, which are-normally inoperative, come into operative position. so that the tendency of the engine to race is prevented.

Reference is to be had to the accompanying drawings forming a part of this specification, in which like characters of reference indicate corresponding parts in all the views, and in which- Figure 1 is a side view of the improved structure, showing the retarding` blades in inoperative position; Fig. 2 is a side View, partly sectional, showing the retarding blades in operative position; Fig. 3 is a plan view showing the retarding blades in `inoperative position; Fig. 4 is a sectional view on the line 4-4 of Fig. 1; while Fig. 5 is a perspective viewsetting forth the block carrying the propeller blades.

The propeller as an entirety is made up of a hub 1 having a sleeve 2 extending therefrom, the propelling blades 3 extending laterally from the hub and the retarding blades 4 lying alongside the hub and being movably supported in position. The particular construction of the hub 1 contemplates the said sleeve 2 and a longitudinally extending opening 5, within which ablock 6 is slidably mounted, being fixed to the end of a rod 7 extending through the interior of the said sleeve 2, the said rod being movable in order to bring about reversal of the propeller blades. Extending transversely of the block 6, and through an opening 8 therein, are the stub shafts 9, carried by the said propeller blades 3: as previously mentioned, the retarding blades 4 extend normally alongside of or longitudinally with the hub 1, as shown particularly in Fig. 1, these retarding blades bein provided with suitable openings adjacent tlieir ends through which the said stub shafts 9 at the ends of the propelling blades Dass. The ends of theretarding blades 4 adjacent the said openings are provided with gear teeth 10 engaging with the racks l1 carried on opposite sides of t-he said hub 1. Extending transversely of the propelling` blades 3, and adjacent their inner ends, are the arms 1Q having slot-s 13 adjacent their outer ends into which the plns 14, extending laterally from the said hub 1, enter.

Referring particularly to Figs. 1 and 3, the propelling blades 3 are shown in operative position, that is, extending at a suitable angle with respect to the said hub, so

that when the hub is turned the said blades will be turned therewith and will serve the usual functions of a propeller. In these same figures the retarding blades 4 are in inoperative position, that is, extending longitudinally of the said hub and closely adjacent the sides thereof, inordcr that as little friction as possible may result, the edge portions 15 of these blades, and the adjacent end portions 16 of the hub, being suitablyv beveled or chani'tered in order to promote such result. If now the rod T is moved toward the left of Fig. 1, or into the position shown in Fig. 2, the engagement of the said arms 12 at the ends of the propelling blades with the pins 14 will turn these blades through a certain angle into the position shown in Fig. 2, so that it the engine is running when such change is made the resistance which such blades offer to the water is materially reduced, the result being a tendency of the engine to race; however, in such position (that is, as shown in Fig. 2) the retarding blades 4 have been brought away 'from the end portion of the hub l and now extend laterally therefrom, with the sides of the said retarding blades engaging the water, the effect of such a position of the retarding blades being to prevent such described racing of the engine. This position of these retarding blades is brought about by reason of the engagement of the gearteeth 10 at the ends thereof with the said racks 11 on the hub 1. It, now, the rod T is moved farther to the left, the travel of the block G within the said opening 5 in the hub 1 will turn the propelling blades into positions substantially at right angles to the position shown in Fig. 1, so that with the jacent the said hub 1 and extend in a direction opposite to the direction of extension shown in Fig. 1 that is, the. propelling yblades have been reversed and the retarding blades have had their positions changed through 180, the middle position of such retarding blades being broadside tothe water so that they exertv a ldamping eie'ct on the engine.. At intermediate positions of the propelling blades the retarding blades also occupy intermediate positions, the combined action of the blades being 'such that the speed of the engine is maintained substantially uniform.

A consideration of the drawingsand descriptive matter will make clear the fact that 'the retarding blades place no added load on the engine in any position; when in operative position, that is, when the propelling blades are inoperative, the said blades serve to prevent racing, andwhen these retardi'ng blades are in the position shown in Fig. 1, they lie closely adjacent the hub,

and the frictiorial resistance of the Water on such blades does. not adect the efficiency` of the construction since there is no component of any force due to the presence of such blades to be overcome by the engine when working. A i

While the drawings set forth the preferred construction andrelationof parts tol bring about the function contemplated, it is, of course, clear that diderent elements may be availed of in order to impart the relative movement to the` retarding blades andthe propelling blades, and it is therefore' clear that the spirit ofthe invention could be detarding blades normally extending in the direction of travel of lthe boat and presenting their broadsides to the water when the i propelling blades are at right angles 'to the `direction of movement of the boat.

,2. A reversible propeller comprising a hub, a block movable longitudinally of the hub, propelling blades movably carried by the block, means betwen the hub and the propelling blades whereby when the block is moved the blades will be reversed, and retarding blades adapted to be moved when the block isy moved, the retarding blades being thereby brought from inoperative to operative position.

3. A reversible propeller comprising a Levante hub, a block movable longitudinally thereof, ropelling blades movably carried by the lock, means whereby movement of the block reverses the said blades, and' retarding b lades'moving With the said block and having a common center of motion with the said propelling blades. l

4. A reversible propeller comprising a hub having an opening therein, the hub being provided with a sleeve whereby a turning movement may be imparted thereto, a block, within'the opening, a rod extending from the block whereby it maybe moved, propelling blades movably carried by the .block and extending laterally from the hub, arms carried by the said blades, pins carried by the hub engaging the arms, whereby when the block vis moved the blades will be reversed, retarding blades moving with the said block, racks carried by the hub, and

gears carried bythe said retarding blades whereby they are moved simultaneously fromy an inoperative'position through an opferative position as the said propelling blades are reversed.

5. A reversible propeller Ycomprising a hub, a member movably carried thereby, propelling blades carriedby the member, retarding blades also carried by the member, and means whereby, when the -said member is moved longitudinally of the hub, theretarding blades will be brought from a position on one side of the propelling blades to another position on the other slde of the propelling blades, the said second position being-diametrieally opposite the first one.

6. A reversible propeller comprising a hub, a member movable longitudinal thereof, propelling bladesl movably mounted on the member, means cooperatively associated with the hub and the propelling blades, whereby movement of the said member will turn the said blades through substantially 90, retarding blades movably mounted on the said member, and means cooperatively associated .with the hub and the blades, 4whereby the retarding blades will be moved through substantially 180 whenA the said l propelling blades are moved.

7. A .reversible propeller comprising a hub, an element vmovable longitudinally thereof, propelling blades movably 'carried by the -said element, means cooperatively associated with the hub and the said blades, wherebythey Will be reversedwhen the element is moved, and retarding' blades adaptedfto be moved from inoperative to` o erative position through movementv o propelling blades, the center of/move'ment gf ttheblades traveling longitudinally of the hub, an element movable longitudinally thereof, propelling blades movablymounted on the element, retarding blades movably thev its

8.- A reversible propeller comprising a mounted on the element, the said blades having a common renter of movement, and meansI associated with the hub and the blades, whereby the retarding bladesl moveL through substantially 180 while the propelling blades mo-ve through substantially 900.`

9. A, reversible propeller comprising a hub, an element movably mounted thereon, propelling blades movably carried by the element, returding blades movably carried by the element, the blades having a common center of movement, movement of the said element moving the center of movement of the said blades with respect to the hub.

10QA reversible propeller comprising a hub havingr an opening therein, the hub beinit; provided with a sleeve whereby a turning movement may be imparted thereto, a block contained Within the opening, means extending from the bleek and through the said sleeve, whereby the block may be moved independently of the 1mb, propelling blades movabl y mounted on the block and extendiner laterally from the hub, arms carried by the said blades, pins carried by the hub and engaging the arms, retarding blades movably mounted on the said block, racks earried by the hub, and gears carried by the said retarding blades, movenient of the block longitudinally of the hub reversing the propolling blades and bringing the retarding blades from an inoperative position through an operative position and into a final inope ative position.

ln testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

HERBERT S. MORLEY. Witnesses:

T. S. JOHNSON, Cuus'rnn S. BADIS. 

